SEATTLE — Two people were injured Monday in a home explosion and fire in a neighborhood in northern Seattle where authorities investigated reports of a gas leak a day earlier, The Seattle Times reported.

The blast, which residents reported hearing and feeling more than a mile away, broke windows in nearby homes.

Firefighters responding to reports of the explosion just after 6:00am local time found the house fully engulfed in flames and sounded a second alarm for additional assistance to ensure the blaze did not reach neighboring homes.

The two injured residents, one of whom sustained life-threatening burns, were transported to Harborview Medical Center.

Authorities evacuated 25 homes following the blast, Seattle Fire Chief Gregory Dean said, as officials from Puget Sound Energy worked to shut off a feeder gas line, according to the Times.

The neighborhood was the site of an investigation Sunday into a natural gas leak. Seattle Fire Department spokesman Kyle Moore said it was too early to tell whether the blast occurred as a result of the leak, KOMO-TV reported.